Internal combustion engine



Jan. 23, 1,934. WRIGHT 1,944,652

. INTERNAL COMBUSTION ENGINE Filed May 24. 1935 4 sheets-*sheet 1 l Inventor Jan. z3, `1934. WR|GHT 1,944,652

INTERNAL COMBUSTION ENGINE Filed May 24, 1933 4 Sheets-Sheet 2 T g 4 w 4J nvenfor frz/m Wright,

Jan. 235 1934. l. WRIGHT 1,944,652

INTERNAL COMBUSTION ENGINE Filed May 24, 1953 4 Sheets-Sheet 3 Inventor ,/Itlorney Jan. 23, 1934. wRlGHT 1,944,652

INTERNAL COMBUSTION ENGINE Filed May 24. 1933 4 Sheets-Sheet 4 7 f v l 5: l '3' Il W /O L T u s) ,77 Inventor Patented Jan. 23, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates broadly to internal combustion engines, and more particularly to engines of the four stroke cycle type.

In accordance with the present invention an engine of this character is provided wherein provision is made for efficient cooling of the power cylinders; to provide an internal combustion engine of this type which is of strong and durable construction; to provide for a connection between the sleeve pistons and their connecting rods in a manner not to require an extension of the rod through the walls of the sleeve piston and thereby reduce the length of the piston pin; to provide an improved arrangement of power cylinder, sleeve piston and fixed compression head; to provide an improved valve operating mechanism` to insure smooth and substantially noiseless valve operation; and lastly to provide an engine of this character having maximum strength with minimum weight.

The invention together with its numerous objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein is illustrated a preferred embodiment of the invention.

It is to be understood that it is in no wise intended to restrict the invention to the specific details of construction, combination and arrangement of elements as herein illustrated and described other than may be necessary to meet the requirements of the prior art and scope of the appended claims.

In the drawings:

Figure 1 is a side elevational view of an internal combustion engine embodying the features of the present invention.

Figure 2 is a top plan view thereof.

Figure 3 is a horizontal sectional view taken substantially on the line 3--3 of Figure 5.

Figure 4 is a similar View taken substantially on the line 4 4 of Figure 5.

Figure 5 is a vertical sectional elevational View through the internal combustion engine.

Figure 6 is an end elevational View of the internal combustion engine with certain parts broken away and shown in section.

Figure 7 is a horizontal sectional View taken substantially on the line '7-7 of Figure 5.

Figure 8 is a vertical sectional View taken substantially on the line 8-8 of Figure 5.

Figure 9 is an elevational View showing the gear connection between the crank shaft and the cam shaft of the engine.

Figure 10 is a plan View of a connecting link to be hereinafter more fully referred to and Figure 1l is an elevational view of an angular bracket to be hereinafter more fully referred to.

Referring to the drawings by reference nu- $0 merals it will be seen that the engine, as `illustrated, consists of two power cylinders l and 2 respectively, although, and as will be evident` to one skilled in the art, the invention may be adapted to an engine having two or any multiple of two, cylinders. The power cylinders 1, 2,A are suitably connected with a crank 4case 3 which suitably houses a crank shaft 4. ThecylindersV 1 and 2i are also provided with suitable water jackets 5. '70

Each of the power cylinders 1, 2 has mounted for reciprocation therein a sleeve piston 6 which is opened at its bottom, and extending across the bottom 0f the sleeve piston is a pair Of relatively spaced cross bars 7 and to which is pivr @tally Connected one end 0f' a Connecting rod .8 that is connected to a throw fia. o f the crank Shaft 4 as, will be Clear from astudy Qf Figures 4 and 5.

vEawh 0f the power cylinders 1. 2, has extending across the bottom open @mi thereof. a `fair gf bars 9 t0 which are Connected thelower en@ of vertical rods 10. and these rods 10'heve. their .up- Der ,ends Screw threadedly engaged, with a' Vgieojl compression head 11 that is circumferentially spaced with respect to its power cylinder in a manner to accommodate the sleeve piston as will be clear from a study of Figure 5.

Each of the cylinders 1, 2 may be constructed as shown with an intake valve 13, spark plug 14 and an exhaust valve 15.

Each of the fixed heads 11 may be constructed as shown with an intake valve 16, spark plug 17 and an exhaust valve 18.

The intake valves 13 of the power cylinder are 'connected with the branches 19 of an intake manifold 20 while the intake valve 16 of the heads 11 are connected with the manifold 20 through the medium of manifold branches 21.

In this connection it will be noted that the sleeve pistons 6 are slotted as at 22 to accommodate the branches 21 of the manifold.

The intake valves 13 and 16 open inwardly and operate automatically, it being apparent, that in regard to valve 13 the same will move in- 105 wardly to open position upon the downward stroke of the sleeve pistons 6, while in regard to the valves 16 these will open inwardly under suction created upon the upward movement or compression stroke of the sleeve pistons 6. y1.10

Suitable tappet mechanism is provided for operating the valves 15 and 18 and in this connection it will be seen that for the valves 15, 18 there are provided tappet arms 23, 24 respectively pivoted intermediate their ends to suitably mounted angular brackets 25, 26. Arranged in vertical alinement with the brackets 25 and 26 are guide brackets 27, 28 respectively. For operating the arms 23 there are provided tappet rods 29 having slidable engagement with the brackets 25, 27 and having rigid link connections 30 With operating rods 31 that are suitably connected as at 32 with cams 33 provided on a cam shaft 34 suitably journalled in the crank case 3.

For operating the rocker arms 24 there are provided tappet rods 35 that have sliding operative engagement with the brackets 26, 28, and also have rigid link connections 36 with operating rods 37. Rods 37 have suitable connections 38 with cams 39 also provided on the aforemen Vtioned cam shaft 34.

The cam shaft 34 is driven from the crank shaft 4 through the medium of suitable gearing 40.

It is understood that the spark plugs 14 and 17 and the means for operating them may also be of any desired design, and therefore it is thought unnecessary to show or describe the ignition system, which latter will of course have a distributor so arranged as to fire the cylinders in the order 1 2.

The construction will b-e understood from the foregoing description. To use the engine it may be assembled as shown, and when an explosion occurs, for example in the power cylinder 2 the sleeve piston 6 in this cylinder will be forced downward and the exhaust valve 15 associated with this cylinder will through the valve operating mechanism provided therefore be moved inward to open position to permit the escape of the burnt gases from the cylinder. As the said sleeve piston 6 moves downwardly fuel admitted into the cylinder through the intake valve 16 provided in the head 11 associated with said cylinder and sleeve piston is compressed. In the explosion of the gases compressed between the top of the said sleeve piston 6 and head 11 the said sleeve piston 6 will move upward and the suction created on the intake valve 16 associated with said head 11 by reason of the upward movement of the sleeve piston 6 Will move the valve to an open position to admit a charge of fuel to the sleeve piston abo-ve the head 11 as soon as the exhaust valve 18 associated with said head 11 is moved to a closed position, it being understood that in the cycle of operation exhaust valve 18 will be moved to an open position through the medium of the valve operating mechanism provided therefore subsequent to an explosion o-f the fuel compressed between the sleeve piston 6 and the compression head 11.

It will be seen that with an engine of this type the sleeve piston 6 serves as the power piston and is subjected to the forces of explosion at the limit of both its downward and upward strokes, and the same will be found to be an improvement over those types of engines embodying either a double headed piston, or a sleeve piston having a second piston operating therein.

It will be of course understood that the engine is supplied with a suitable carbureter to which the intake manifold 20 is connected; also with a suitable water circulating means for cooling purposes, together with a suitable lubricating system.

Having thus described my invention, what I claim as new is:

1n an internal combustion engine, a crank case, a crank shaft journalled therein, a power cylinder carried by the crank case, cross bars extending across the lower end of the power cylinder, rods extending vertically upwardly from said cross bars, a xed stationary head on the upper ends of said rods within the power cylinder, a sleeve piston mounted to slide over the xed head within the power cylinder, cross bars in the lower end of the sleeve piston, a connecting rod pivotally connected at one end with the last named cross bars, and at a relatively opposite end having an operating connection lli) exhaust ports for the other of said chambers-.1.

opening through said fixed head, and means for opening and closing all of said intake' and exhaust ports.

IRVIN WRIGHT. 

